——­, its relation to the combining oxygen, 921, 962. ——­, ——­ combining sulphur, 943. ——­, ——­ the transferred elements, 923, 962. ——­, relation of bodies in, 962.  Voltaic current, 1617. See Current, electric.  Voltaic discharge, positive and negative, 1524.  Voltaic decomposition, 450, 600. See Decomposition, electro-chemical. Voltaic electricity, identical with electricity, otherwise evolved, 268,
  360.
——­, discharged by points, 272. ——­, ——­ hot air, 271, 274. ——­, its tension, 268, 275. ——­, evolution of heat by, 276. ——­, its magnetic force, 277. ——­, its chemical force, 278. ——­, its spark, 280. ——­, its physiological effects, 279. ——­, its general characters considered, 268. Voltaic pile distinguished, 856, note. ——­, electricity of, 875. ——­, depends on chemical action, 872. ——­, relation of acid and bases in the, 927. ——. See Battery, voltaic. Voltaic spark without contact, 915, 956. ——­, precautions, 958, 1074.  Voltaic trough, 989. See Battery, voltaic.

Water, flowing, electric currents in, 190. ——­, retardation of current by, 1159. ——­, its direct conducting power, 1017, 1159, 1355. ——­, ——­ constant, 984. ——­, electro-chemical decomposition against, 494, 532. ——­, poles of, 494, 533, 558. ——­, its influence in electro-chemical decomposition, 472. ——­ is the great electrolyte, 924. ——­, the exciting electrolyte when pure, 944. ——­, ——­ acidulated, 880, 926, 1137. ——­, ——­ alkalized, 931, 934, 941. ——­, electrolytic intensity for, 968, 981, 1017. ——­ electrolyzed in a single circuit, 862. ——­, its electrolysis definite, 732, 785, 807. ——­, decomposition of by fine wires, 327. ——­, quantity of electricity in its elements, 853, 861. ——­, determined to either pole, 553. Wheatstone’s analysis of the electric brush, 1427. ——­ measurement of conductive velocity in metals, 1328. Wire, ignition of, by the electric current, 853, note, 1631. ——­ is uniform throughout, 1630. Wire a regulator of the electric current, 853, note. ——­, velocity of conduction in, varied, 1333. ——­, single, a current induced in, 170. ——­, long, inductive effects in, 1064, 1118. Wollaston on decomposition by common electricity, 309. ——­ decomposition of water by points, 327.

Zinc, amalgamated, its condition, 863, 1000. ——­, used in pile, 999. Zinc, how amalgamated, 863. ——­, of troughs, its purity, 1144. ——­, its relation to the electrolyte, 949. ——­, its oxidation is the source of power in the pile, 919. ——­ plates of troughs, foul, 1145. ——­ ——­, new and old, 1146. ——­, waste of, in voltaic batteries, 997.

THE END.

PRINTED BY RICHARD AND JOHN E. TAYLOR. 
RED LION COURT, FLEET STREET.

WORKS PUBLISHED BY RICHARD AND JOHN E. TAYLOR, PRINTERS AND PUBLISHERS TO THE UNIVERSITY OF LONDON, RED LION COURT, FLEET STREET.